▎ 摘　　要

NOVELTY - Preparing graphene-nickel-iron-cobalt alloy plating layer by electrodeposition, comprises (a) adding nickel(II) sulfate hexahydrate, ferrous sulfate heptahydrate, cobalt(II) sulfate heptahydrate, nickel(II) chloride hexahydrate, graphene, sodium chloride, boric acid, trisodium citrate dihydrate, saccharin sodium dihydrate, ascorbic acid and sodium lauryl sulfate to deionized water, uniformly stirring, and then ultrasonically dispersed to obtain plating solution, (b) polishing surface of base steel sheet with 200-mesh, 400-mesh, 800-mesh, 1200-mesh, and 1500-mesh metallographic sandpaper, and then polishing on a polishing machine until base steel sheet having no scratches, and smooth and mirror surface, (c) washing sequentially the surface of the polished steel sheet with absolute ethanol, deionized water, hydrochloric acid and deionized water, and drying to obtain substrate to be plated, and (d) performing electroplating by adjusting pH of the plating solution. USE - The method is useful for preparing graphene-nickel-iron-cobalt alloy plating layer by electrodeposition. ADVANTAGE - The method is simple and economical, and provides plating layer having compact and uniform, high hardness, wear resistance, corrosion resistance and electro-catalysis hydrogen evolution performance. DETAILED DESCRIPTION - Preparing graphene-nickel-iron-cobalt alloy plating layer by electrodeposition, comprises (a) adding nickel(II) sulfate hexahydrate, ferrous sulfate heptahydrate, cobalt(II) sulfate heptahydrate, nickel(II) chloride hexahydrate, graphene, sodium chloride, boric acid, trisodium citrate dihydrate, saccharin sodium dihydrate, ascorbic acid and sodium lauryl sulfate to deionized water, uniformly stirring, and then ultrasonically dispersed to obtain plating solution, (b) polishing surface of base steel sheet with 200-mesh, 400-mesh, 800-mesh, 1200-mesh, and 1500-mesh metallographic sandpaper, and then polishing on a polishing machine until base steel sheet having no scratches, and smooth and mirror surface, (c) washing sequentially the surface of the polished steel sheet with absolute ethanol, deionized water, hydrochloric acid and deionized water, and drying to obtain substrate to be plated, and (d) placing substrate to be plated as cathode and nickel plate as anode in a plating tank containing the plating solution prepared in the step (a), adjust pH of the plating solution to 3.8, and distance between the cathode and the anode to be 3-5 cm, and electroplating at 60 degrees C and current density of 60 mA/cm2 with magnetic stirring rate of 120 revolution/minute for 0.5 hours.